2(alsoChristmas cracker)a tube of coloured paper that makes a loud explosive sound when it is pulled open by two people. Crackers usually contain a paper hat, a small present and a joke, and are used in Britain at Christmas parties and meals.Who wants to pull this cracker with me?see alsofirecracker

3(British English,informal)something that you think is very good, funny, etc.It was a cracker of a goal.I've got a joke for you. It's a real cracker!

4(North American English,slang)an offensive word for a poor white person with little education from the southern US

5(informal)a person who illegally finds a way of looking at or stealing information on somebody else’s computer systemSee related entries:Computer problems